Suburban SDN2U Water Heater Won't Stay Lit: Thermocouple Position Fix
Spent hours replacing the thermocouple, cleaning the burner assembly, checking gas connections — but my 2025 Jayco's Suburban SDN2U water heater still won't stay lit. I've heard this is a known problem on 2024-2025 models and that it might need a thermocouple position adjustment to match the working burner.
Before I attempt anything myself, I'm really concerned about making things worse or creating a safety hazard. Should the thermocouple tip be positioned in the outer flame cone like the working burner? I'm also worried about voiding my warranty on this new RV - would this type of adjustment be covered under warranty, and should I document the issue before trying any DIY fix?
I want to make sure I approach this safely and properly. Any guidance on whether this is something I can adjust myself or if I should insist on professional repair would be greatly appreciated. …more
Before I attempt anything myself, I'm really concerned about making things worse or creating a safety hazard. Should the thermocouple tip be positioned in the outer flame cone like the working burner? I'm also worried about voiding my warranty on this new RV - would this type of adjustment be covered under warranty, and should I document the issue before trying any DIY fix?
I want to make sure I approach this safely and properly. Any guidance on whether this is something I can adjust myself or if I should insist on professional repair would be greatly appreciated. …more
